package com.abkj.platform.tail.util;

import java.io.PrintStream;
import java.security.MessageDigest;

public class MD5andKL
{
  public static String MD5(String inStr)
  {
    MessageDigest md5 = null;
    try {
      md5 = MessageDigest.getInstance("MD5");
    } catch (Exception e) {
      System.out.println(e.toString());
      e.printStackTrace();
      return "";
    }
    char[] charArray = inStr.toCharArray();
    byte[] byteArray = new byte[charArray.length];

    for (int i = 0; i < charArray.length; i++) {
      byteArray[i] = ((byte)charArray[i]);
    }
    byte[] md5Bytes = md5.digest(byteArray);

    StringBuffer hexValue = new StringBuffer();

    for (int i = 0; i < md5Bytes.length; i++) {
      int val = md5Bytes[i] & 0xFF;
      if (val < 16)
        hexValue.append("0");
      hexValue.append(Integer.toHexString(val));
    }

    return hexValue.toString();
  }

  public static String KL(String inStr)
  {
    char[] a = inStr.toCharArray();
    for (int i = 0; i < a.length; i++) {
      a[i] = ((char)(a[i] ^ 0x74));
    }
    String s = new String(a);
    return s;
  }

  public static String JM(String inStr)
  {
    char[] a = inStr.toCharArray();
    for (int i = 0; i < a.length; i++) {
      a[i] = ((char)(a[i] ^ 0x74));
    }
    String k = new String(a);
    return k;
  }

  public static void main(String[] args)
  {
    String s = "1231231312341242142134";
    System.out.println("原始：" + s);
    System.out.println("MD5后：" + MD5(s));
    System.out.println("MD5后再加密：" + KL(MD5(s)));
    System.out.println("解密为MD5后的：" + JM(KL(MD5(s))));
  }
}